San Marcos, Hays County
Water damage in San Marcos, Texas
San Marcos is the Hays County seat, on Interstate 35 about 25 miles south of Austin. The Census Bureau counts 77,830 residents in 2025.
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What the City of San Marcos says
- Emergency line
The city lists 512-393-8300 for electric and water or wastewater emergencies. Its page shows a different number in the link text, so confirm on the city's page before you rely on it.
- Utility customer services
1040 Hwy 123, open weekdays 8 a.m. to 5 p.m. excluding holidays. 512-393-8383, option 3.
- Permit Center
630 E. Hopkins Street, 512-805-2630, permitinfo@sanmarcostx.gov. Online applications run through MGO Connect, which lists plumbing as a category.
A town built on springs
The Texas State Historical Association describes San Marcos Springs as the second largest natural cluster of springs in Texas, two miles northeast of the county courthouse. Water from limestone fissures along the Balcones fault forms Spring Lake and the San Marcos River.
Calls from San Marcos follow the same path as the rest of the line. The call goes to an independent restoration contractor, and the contractor handles the work.
Three flood sources, by the city's account
The City of San Marcos says flooding there comes mainly from the San Marcos River, the Blanco River and Purgatory Creek, and that floodwater can cover many blocks up to three or four feet deep. It says flooding in all three areas can come with little warning, citing an October 1998 flood that covered streets within 30 minutes and a November 2001 Blanco River flood that came within an hour of a thunderstorm starting.
The National Weather Service's summary of the May 2015 flood lists the San Marcos River among the worst-hit rivers and notes the river surge reached San Marcos just before 3 a.m. on the 24th.
What the city can tell you about a property
The city's floodplain page says it can tell residents where a property sits in relation to elevation certificates, Special Flood Hazard Areas, flood maps, the floodway, local drainage problems, flood depth data and historical flooding. It also publishes a page on the 2015 Memorial Day flood and a map of water crossings and creeks.
The page repeats a point that matters for claims: homeowner's insurance policies do not cover flood damage. It links Hays County's rain and stream gauge map, FEMA's Map Service Center and FloodSmart.
A property being above past flood levels does not settle the question. The city says the next flood could be worse, and that a property in the floodplain is likely to be damaged someday.
Water is still moving. Call now.
One call connects you with an independent restoration contractor who serves the Kyle area. Then you decide what happens next.